Roller-chain sprockets, from #25 to #240
ANSI, ISO 606 and bicycle chains. Set the chain and teeth, choose the hub and bore, add spokes, and download STL, STEP, DXF or SVG — a single sprocket or a two-sprocket drive with its chain.
Coming soon
Everything a sprocket needs
Standard chains
ANSI 25 to 240 and the heavy series, ISO 606 B-series 05B to 72B, and bicycle chains.
Tooth form from the standard
The ISO 606 envelope with an adjustable fit, or the ASME B29.1 theoretical form.
Multi-strand
One to several strands at the chain's transverse pitch, with the standard tooth width and side chamfer.
Hubs and bores
ASME hub types A, B and C; round, D-flat, keyway, splined and hex bores; set screws.
Spokes and lightening
Straight, tapered, curved and other spoke styles, or round lightening holes.
Two-sprocket drive
Chain length in pitches, exact centre distance, and warnings for wrap, ratio and centres.
Bicycle parts
Cassette cogs and chainrings, with the makers' bolt patterns.
Fit that prints
Print compensation for the STL; STEP stays at true size.
The same files
STEP, STL, DXF, SVG and PNG — the formats and Download window you know from the pulley tool.
Supported chains
| Family | Sizes | Source |
|---|---|---|
| ANSI roller chain | 25 – 240, heavy series 60H – 240H | ASME B29.1 |
| ISO 606 B-series | 05B – 72B | ISO 606 |
| Bicycle | 081, 082; 9 – 12 speed | ISO 9633 (and approximations, marked) |
Meanwhile, the Timing Pulley Generator is ready
Same interface, same exports, same token pricing.